Boiling

solubility in water, hexane and ethyl alcohol. Also, its density and boiling point were obtained and compared to the theoretical values. Theory Chemical substances can be identified through investigation of their chemical and physical properties and then comparing the experimental values to the standard values. Physical properties do not change the chemical composition of the substance. Physical properties include; density, boiling point, and solubility, etc. The density of a substance is…

In Table 3, the boiling point and enthalpy of vaporization are increasing as the number of carbon and hydrogen are increasing. If we make analysis on all three of the tables, alkanes have the lowest boiling points, then follow by straight chain 1-alcohol, then 1-monochlorinated alkanes. As for the enthalpy of vaporization, the highest is straight chain 1-alcohols, then 1-monochlorinated, and alkanes. Task 2 In this task, there will be two different graphs. One is graph of boiling points of…

1. Explain why SiSe2 does not dissolve in water, and why PN does dissolve in water. Your answer must demonstrate that you understand the dissolving process. → The reason why SiSe2 (silicon diselenium) doesn’t dissolve in water is because this molecular compound is non-polar, which has both negatively charged dipoles on each end, thus the absence of dipoles that got ‘cancelled out’ cannot join the bonds of water molecules because of its poor/weak attraction. The waters’ stronger attractive…

Conclusion: The general conclusion that I was able to produce about the effects of salt on the boiling point temperature of water is that with the addition of salt, the boiling point temperature of water increases. The results of the lab experiment do agree with my predictions and I can accept my initial hypothesis. However, I believe the data would be more consistent and solid had 2M and 4M of NaCl had been included in the experiment, rather than jumping from 1M to 3M to 5M. Discussion: For…

begin the experiment 3 test tubes must be acquired; a boiling tube, large test tube and a small test tube. The large test tube must be completely dried with a paper towel and labeled R for Reactants. After that is done a piece of weighing paper should be placed on a balance and tared. After make sure the balance is correctly tared, a spatula must be used to collect 2 grams of granular Zinc on the weighing paper. The zinc is then added to the boiling tube. Using a different spatula weigh out 2…

In this method, a solute is dissolved in a solvent at boiling point to increase solubility. The new solution is then cooled to get pure crystals of the solute. Using this technique of an unknown helps one get a pure substance which could be tested for melting point. In Figure A, the red arrows show the series…

simple and fractional. Simple distillation is used when separating liquids and solids or between liquids with boiling points that differ by more than 40-50°C. On the other hand, fractional distillation separates two volatile liquids in order to achieve two purified components. In the case of this experiment, fractional distillation is used as the unknown liquids were thought to have similar boiling points. Fractional distillation utilizes a temperature gradient to ensure that the more volatile…

are called the intermolecular forces, such as electronegativity, help to determine the boiling and melting points of each element. Each of these intermolecular forces differs in strength, but even the strongest one is weaker than the intramolecular forces on a molecule. These melting and boiling points can differ by massive amounts, sometimes going from high positive temperatures…

One such way of removing caffeine includes distillation, distillation is possible between the two as they have a distance of over 50 degrees Celsius in boiling points. Water has a boiling point of 100 degrees Celsius and caffeine has a boiling point of 178 degrees Celsius. This means if the solution is heated to 100 degrees the water will begin to evaporate but the caffeine will not. The water vapours can then undergo condensation leaving pure water…

information is provided from acros.com. Isopropyl Acetate: Molecular Formula Molecular Weight Density Boiling Point C5H10O2 102.13 g/mol 0.872 g/cm3 89°C The two most significant health hazards for isopropyl acetate are eye irritation and dizziness. Since this molecule was in a mixture, no quantity in mL or mols can be determined. Isopentyl Acetate: Molecular Formula Molecular Weight Density Boiling Point C7H14O2 130.19 g/mol 0.87 g/cm3 142°C The two most significant health hazards for…